Line a baking sheet with parchment paper.
Arrange whole graham crackers in a single layer to form a large rectangle.
Spread marshmallow creme evenly over the top of each graham cracker.
In a microwave-safe bowl, melt the chocolate in 30-second intervals, stirring in between until smooth.
Pour and spread the melted chocolate evenly over the marshmallow layer.
Before the chocolate sets, sprinkle with mini marshmallows and crushed graham crackers.
Optional: Lightly toast the mini marshmallows with a kitchen torch for a classic s’mores touch.
Let the bark sit at room temperature or refrigerate until fully set.
Melt additional chocolate and drizzle over the top. Optional: sprinkle with flaky salt.
Once fully hardened, break into pieces and serve.